@react-email/render an optional peerDependency by @vcapretz in https://github.com/resend/resend-node/pull/532The breaking change should only affect users that use the react option to send emails, but don't have @react-email/render installed. To properly have it working, you should install it in that case.
[!WARNING] If you want to upgrade to remove
@react-email/renderfrom your project, you should uninstall the SDKnpm uninstall resendand install it againnpm install resend@latest. This will ensure that@react-email/renderdoesn't remain in your lockfile in a safe way.
Full Changelog: https://github.com/resend/resend-node/compare/v4.8.0...v5.0.0
Fetched April 3, 2026